Edward bausch



(No Model.)

E. BAUSOH.

MICROSCOPE- N0.57'7,344. Patented Feb. 16, 1897.-

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To all whom it may concern.-

EDWARD BAUSOH, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE BAUSOH &' LOMBOPTICAL COMPANY, OF SAME PLACE.

M l C R O S C O P E SPECIFICATION forming part of Letters Patent No.577,344, dated February 16, 1897. Application filed August 21, 1896.Serial No. 603,495. (No model-1 Be it known that I, EDWARD BAUSCH, ofRochester, in the county of Monroe and State of New York, have inventedcertain new and useful Improvements in Microscopes; and I do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, forming a partof this specification, and to the reference-numerals marked thereon.

My present invention relates to microscopes and similar instruments, andhas for its objects to improve the fine adjustment thereof byfacilitating the assembling of the parts, and also to provide animproved top or surface for the stage or platform; and to these ends itconsists in certain improvements in construction and combinations ofparts, all as will be hereinafter described, and the novel featurespointed out in the claims at the end of this specification.

In the drawings, Figure 1 is a side elevation of a microscope providedwith my improvements; Fig. 2, a vertical sectional view on the line wasof Fig. 1; Fig. 3, a similar View taken at right angles to the plane ofthe section of Fig. 2; Fig. 4, a plan view of the pillar, showing asection of the adjusting-cap; Fig. 5, a sectional view on the line y yof Fig. 1, through the stage.

Similar reference-numerals in the several figures indicate similarparts.

The base 1 and standard 2 are of the usual construction, 3 indicatingthe pillar, pivoted atet to the standard and, as usual, angular incross-section.

5 indicates the sleeve, fitting and sliding upon the pillar 3 and uponwhich the tube 6, carrying the lenses, is adjustably mounted and movedby the usual wheel 7.

The pillar 3 which may be rigidly attached to the base, if desired) isprovided with the longitudinal recess 8, threaded at its upper end forthe correspondingly threaded lower end of the yoke 9, which latter isprovided with acentral aperture for the passage of the screw 10, securedto the bridge 11. The lower end or head of the screw 10 abuts against aspring 12 in the recess 8 of the pillar and forces the bridge upward.

13 indicates the adjusting-screw, formed with or attached to the cap 14and threaded in the upper aperture in the yoke and operating upon thebridge, preferably through the loose pin 15. The means for securing thebridge to the sleeve 5 consists of a collar or ring 16, screwing intothe end of the sleeve,as at 17, and having an interior annular shoulderor rim 18, upon which the bridge rests and to which it is secured by aclamping ring or collar 19, screwing into the threaded portion of thering 16 above the shoulder. This construction enables me to assemble theparts by passing the screw through the aperture in the yoke into thebridge, then to screw the yoke into the pillar until the shoulder uponit seats on the end of the latter, this rotary movement of the yoke ofcourse carrying the bridge with it, and after the yoke is seated thecollar 19 is screwed down, tightly clamping the bridge to the sleeve andenabling the fine adjustment of the instrument to be accomplished by thecap-screw 13, the scale'20 on the edge of the cap cooperating with asuitable index 21 in the usual manner, the sleeve being held pressedupward against the screw by the spring 12, as will be understood.

The advantage of securing the bridge in position by the clamping-ring isthat it can be tightly fastened to the sleeve irrespective of theposition it may assume after the yoke is screwed tightly to the pillar,which enables me to keep all the parts in tight condition, necessary inan instrument of this description.

The table or stage forming another part of my present invention isconstructed as shown particularly in Figs. 1 and 5 and embodies abase-plate 25, supported in any suitable manner, or, as shown, from thepillar, and preferably consisting of a piece of metal having its frontportion around the central aperture recessed and provided with undercutedges 26 and a series of studs or headed projections 27, distributedthroughout the upper surface of the recessed portions. 95

28 indicates the upper cover of the stage, composed of hard rubber,gutta-percha, or similar material more or less plastic and preferablyblack, so as to prevent light-reflection, and which is secured upon andmade practically integral with the stage by being pressed down into therecess in the stage While rendered semiplastic by heat, causing thematerial to flow around and beneath the undercut edge and the headedstuds or anchor projections, as in Fig. 5, after which the upper portionis finished off in any suitable manner to form a smooth dead-blackmat-surface, which is eminently desirable in an instrument of thisdescription. By this anchoring the rubber cover is practically integralwith the stage and not only prevents the separation of the rubber fromthe metal, but is a vast improvement over the stages having blackenedbrass tops.

I claim as my invention- 1. The combination with the pillar, the yokeand the spring, of the adjustable sleeve, the bridge passing through theyoke, and means for connecting the ends of the bridge to the sleeve inany position of rotary adjustment, and the ad justing-screw,substantially as described.

2. The combination with the pillar, the yoke screwing therein, and thespring, of the bridge passing through the yoke and engaging the spring,the sleeve having the shoulder, the adjustable collar on the sleeveclamping the yoke upon the shoulder, and the adj ustingscrew,substantially as described.

3. The combination with the pillar, and the yoke screwing therein,of thesleeve,the bridge passing through the yoke, means for clamping thebridge to the sleeve in any position of rotary adjustment, and means foroperating the sleeve and pillar relatively, operating through the yokeand bridge, substantially as described.

4. In an instrument of the kind described, the combination with thestage having the anchors thereon, of the stage-cover composed of hardrubber or similar material firmly secured by the anchors to the stage,substantially as described.

5. In an instrument of the kind described, the combination with thestage recessed and having the undercut edges and the anchors, of thestage-cover of hard rubber or similar material in which the anchors areembedded, substantially as described.

EDWARD BAUSCII.

Witnesses:

RUDOLF ZIMMERMAN, FRANK H. MASON.

